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Ivanyukite-K
A valid IMA mineral species
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About Ivanyukite-K
Formula:
K2Ti4(SiO4)3(OH)2O2 · 9H2O
Colour:
Pale blue
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
2.70
Crystal System:
Isometric
Member of:
Name:
Named in honor of Gregory Yur’evich Ivanyuk, Russian mineralogist and petrologist, head of the Laboratory of Self-Organized Mineral Systems in the Geological Institute of the Kola Science Centre of the Russian Academy of Sciences.
Type Locality:
Compare other members of the group: ivanyukite-Na and ivanyukite-Cu. Ivanyukite-K is not analogous to these members (amount of water, oxide and hydroxide anions vary).
The structure of all ivanyukites is described as a 3D framework of the pharmacosiderite type; it is based on of four edge-sharing TiO6 octahedra connected by the silicate tetrahedra. It contains 8-membered rings defininng channels with an effective width of 3.5 Å. K, Na and water reside within the channels.
The structure of all ivanyukites is described as a 3D framework of the pharmacosiderite type; it is based on of four edge-sharing TiO6 octahedra connected by the silicate tetrahedra. It contains 8-membered rings defininng channels with an effective width of 3.5 Å. K, Na and water reside within the channels.
Unique Identifiers
Mindat ID:
32619
Long-form identifier:
mindat:1:1:32619:9
Similar Names
| Ivanyukite-Cu | A valid IMA mineral species | CuTi4(SiO4)3(OH)2O2 · 7H2O |
IMA Classification of Ivanyukite-K
Approved
IMA Formula:
K2Ti4+4(SiO4)3O2(OH)2·9H2O
Approval year:
2007
First published:
2009
Type description reference:
Yakovenchuk, V. N., Nikolaev, A. P., Selivanova, E. A., Pakhomovsky, Y. A., Korchak, J. A., Spiridonova, D. V., Zalkind, O. A., Krivovichev, S. V. (2009) Ivanyukite-Na-T, ivanyukite-Na-C, ivanyukite-K, and ivanyukite-Cu: New microporous titanosilicates from the Khibiny massif (Kola Peninsula, Russia) and crystal structure of ivanyukite-Na-T. American Mineralogist, 94 (10) 1450-1458 doi:10.2138/am.2009.3065
Classification of Ivanyukite-K
9.AG.50
9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Iv-K | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Ivanyukite-K
Vitreous
Transparency:
Translucent
Colour:
Pale blue
Streak:
White
Hardness:
4 on Mohs scale
Comment:
ca. 4
Tenacity:
Brittle
Cleavage:
Perfect
{100}
{100}
Fracture:
Step-Like
Density:
2.70 g/cm3 (Measured) 2.69 g/cm3 (Calculated)
Koashva Open Pit, Koashva Mt, Murmansk Oblast, Russia